摘要
制备了含10vol％,20vol％及30vol％SiC晶须的Si_3N_4基复合材料,对其室温及高温机械强度的测试研究表明,SiC晶须对基体的高温机械性能有明显的增强作用。含20vol％SiC晶须的复合材料1200℃下强度达780MPa,比基体材料提高50％。通过SEM和TEM研究,讨论了SiC晶须增强的原因。
10vol％, 20vol％ and 30vol％ SiC whisker-Si_3N_4 matrix composites were prepared. The study on mechanical strength of above composites at room and high temperatures indicates the significant strengthening effect of SiC whisker on the high-temperature mechanical property of the composite. The 20vol％ SiC whisker composite has a 1200℃ high-temperature strength of 780 MPa which is 50％ higher than that for Si_3N_4 matrix. The strengthening causes are discussed through SEM and TEM studies.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1991年第4期381-384,311,共5页
Journal of The Chinese Ceramic Society
关键词
碳化硅
氮化硅
陶瓷
晶须
增强
SiC whisker
strengthening
Si_3N_4 matrix composite
